Nasser Muthana, a 20-year-old medical student from Cardiff, and his 17-year-old brother Aseel Muthana went to Syria to fight with ISIS are featured inviting fellow Muslims to travel to Iraq and Syria to join the ISIS militants in their attempt to create a Caliphate.

Threatening they “understand no borders,” the group promised to go to “Lebanon and Jordan” next and said jihad is the “cure for depression.” The western militants also promised those who answer the call will “feel the happiness they are felling” and have the “honor of a believer.”